The Green Line had six trolley derailments in 2016, according to the recently updated National Transit Database, and as described in a recent Boston Globe article. Combined with two subway maintenance vehicle derailments, this positioned the MBTA as the transit agency with the most derailments last year in the United States.
So what is behind this data? Why should we look closer?
In 2015, the National Transit Database derailment figures began including derailments of vehicles not intended for passengers, including maintenance vehicles. This increased the MTBA’s reported annual derailments slightly. It is also worth noting that these published figures do not include derailments for commuter rail systems, as those incidences are instead reported to the Federal Railroad Administration.
The MBTA is this country’s fifth-largest mass transit system, based on daily ridership, and has the busiest light rail system (Green Line and Ashmont-Mattapan high-speed line). Derailments are less common for parts of the MBTA system beyond the Green Line. In 2016, the MBTA had its first derailments on the Orange and Red lines since 2001; both derailments involved vehicles that are not for passengers.
Sensationalizing this data only serves to create poor public opinion, and the MBTA leadership feels confident the MBTA system, including the Green Line, is safe. In 2016, none of the derailments resulted from a collision, and no passengers or employees were injured in a derailment. The number of annual derailments for the MBTA is down significantly (over 75%) from a high of 29 derailments in 2007, and the MBTA is committed to reducing derailment on the Green Line further through improved maintenance and monitoring. Even when no one is hurt, derailments impact service delivery and can shut down lines or stations for hours. They can also undermine riders’ support of and trust in the MBTA.
There are, however, other challenges to the MBTA system, including its age and need for additional funding, as well as for maintenance. The Green Line is the oldest subway line in the United States, with tunnel sections dating back to 1897, and it is one of the oldest light rail systems above ground as well. Other systems topping the 2016 list of derailments include New Orleans and the San Francisco Municipal Railway, which are also historic systems. This is another reminder of the importance of funding investments in maintaining and rebuilding aging infrastructure. The challenge isn’t limited to the MBTA. The U.S. DOT estimates a nearly $90 billion backlog in transit infrastructure maintenance, just to preserve existing systems. In 2015, the MBTA’s maintenance backlog was over $7 billion, and it would need to spend about $765 million annually to eliminate the maintenance backlog over 25 years.
Although rapid transit remains a safe way to travel compared to travel by car, recent crashes on commuter railroads in other parts of the country are drawing attention to the limitations of existing infrastructure. Investments are necessary to ensure safe, reliable, and efficient mobility for the economic competitiveness and vitality of cities like Boston for decades to come.
By: Tracy Zafian, UMTC Research Fellow, and Eric Gonzales, UMTC Research Affiliate